Thread: Bad MAF?
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#10: 06-29-2011, 05:58 PM
 
 sigmafour
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the vacuum line that caused my P0171 (and for kicks I pulled it off again and the code came back fairly promptly!) was tiny but had a hell of a suck on it while it was off! I think the boost pressure blew it off in the first place.

It definitely doesn't take much of a leak to upset the idle and cause all kinds of rough engine issues... and yes, after a few starts with the MAF reconnected the CEL went out and all started to behave again so I cleaned it for nothing but it was grubby so all for the best...